https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-02T11:33:34.720492+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/cve-2026-44181 CVE-2026-44181 — Jupyter Enterprise Gateway: Jinja2 Template Server Side Template Injection results in Remote Code Execution 2026-10-02T11:33:34.722098+00:00

Affected: jupyter-server enterprise_gateway

Jupyter Enterprise Gateway launches remote Jupyter Notebook kernels across distributed clusters like Apache Spark, Kubernetes, and Docker Swarm. In versions 2.0.0rc2 and above, prior to 3.3.0, the environment variables (KERNEL_XXX) used during the rendering of the Kubernetes manifest are vulnerable to Server Side Template Injection (SSTI). By including Jinja2 template expressions it is possible to execution Python code and OS Commands in the Enterprise Gateway service. The code can use or steal the Kubernetes service account token, which can steal Kubernetes secrets and be used to fully compromise the Kubernetes cluster by scheduling a privileged pod or a pod with a hostPath volume mount. This issue has been fixed in version 3.3.0.

 https://cve.radiocsirt.org/vuln/ghsa-f49j-v924-fx9w GHSA-f49j-v924-fx9w — Jupyter Enterprise Gateway: Jinja2 Template Server Side Template Injection resulting in Remote Code Execution 2026-10-02T11:33:34.722153+00:00

Affected: PyPI: jupyter_enterprise_gateway

### Summary

The environment variables (`KERNEL_XXX`) used during the rendering of the Kubernetes manifest are vulnerable to Server Side Template Injection (SSTI). By including Jinja2 template expressions it is possible to execution Python code and OS Commands in the Enterprise Gateway service. The code can use or steal the Kubernetes service account token, which can steal Kubernetes secrets and be used to fully compromise the Kubernetes cluster by scheduling a privileged pod or a pod with a `hostPath` volume mount.

### Details

The `KERNEL_POD_NAME` variable is rendered using Jinja2, allowing for code execution via template expression statements, in this code: https://github.com/jupyter-server/enterprise_gateway/blob/152c20f162f2fab700c04c8830ebf8c1e2e2217a/enterprise_gateway/services/processproxies/k8s.py#L219-L247

The Jinja2 template for the Kubernetes manifest contains several `kernel_xxx` variables, in addition to `kernel_pod_name` discussed above, such as `kernel_working_dir` that are used when rendering the manifest and are all vectors for SSTI. https://github.com/jupyter-server/enterprise_gateway/blob/152c20f162f2fab700c04c8830ebf8c1e2e2217a/etc/kernel-launchers/kubernetes/scripts/kernel-pod.yaml.j2#L77

These values come from the environment passed in the API call, where they were `KERNEL_XXX` before being converted to lowercase.

https://github.com/jupyter-server/enterprise_gateway/blob/152c20f162f2fab700c04c8830ebf8c1e2e2217a/etc/kernel-launchers/kubernetes/scri…